/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Populates the passed array of VertexIDs with the vertices adjacent to this vertex
template<typename Alloc> void GetVertexAdjacentVertices ( const [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID, [TArray](API\Runtime\Core\Containers\TArray)< [FVertexID](API\Runtime\MeshDescription\FVertexID), Alloc > & OutAdjacentVertexIDs ) const